Improvement in securing bits in braces



v UNITED STATES PATENT OFFICE. i

oEEn PEoK, oE wlNDson, VERMONT.

IMPROVEMENT IN SECURING BITS IN BRACES.

Specification forming part of Letters Patent N0. 41.715, dated February 23, 1F64.

To all whom t may concern,.-

Beit known that 1, OBED BECK, of Windsor, in the county ot' Windsor and State of Vermont, have invented a new and Improved Mode of Securing Bits in Braces or Bit- Stocks; and I do hereby declare that the following is a full, clear, and exact description ot' the same, reference being had to the. accomp tnying drawing, making a part ofy this specization, the said drawing being a side secti mal view ot my invention.

lhis invention consists in having a screw piss transversely through the socket of the brace or bitstock, said screw being` provided With a head which projects laterally from it, and has a notch made in it to form a projection, which, by means of a nut on the screw, is diawn into a recess in the shank ot' the bit, so as to tirmly secure the bit to the brace or bit stock.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it,

A represents the brace or bit-stock, which may be ot' the usual construction, and therefore does not require a special description.

B represents the socket of the brace or bitstock, which has a quadrilateral hole, a, made in it to receive the shank b of the bit, said shank as well as the hole a being of taper form, as clearly shown in the drawing.

C represents a screw, which passes transversely through the socket B, and has a nut, c, at one end ot' it. The head d of the screw projects laterally from it, and has a notch, e, made in its inner side to form a projection, f, to lit into a recess, g, in one side of the shank b of the bit, as shown in the drawing.

When the shank I) of the bit is fitted in the socket B, the projection f of the head d of the screw is drawn into the recess g of the shank by turning'the nut c; and when the shank is thus secured, the outer surface of the head d will be flush with thel exterior of the socket.

In order to detach the shankb from the brace or bit-stock, the nut c is unscrewed on the screw C suliciently far to admit of the head d being pressed back so that the projec` tionf will be ont of the recessg in the shank, as shown in red in the drawng'.

This arrangement is extremely simple and eflicient. It secures the shank b of the bit rmly in the socket, and at the same time may be economically applied to braces or bit-stocks.

Having thus described my invention, what I claim as new, and desire to secure byLetters' Patent, is-

The screw-O, passing transversely through the socket B, and provided with the nut c and head d, the latter being notched to form a projection, f, to fit in a recess, g, in the shank b ot' the bit, substantially as and for the purpose herein set forth.

OBED BECK.

Witnesses:

Taos. S. J. DOUGLAS, M. M. LIVINGSTON. 

